Name the chronic respiratory disorder caused mainly by cigarette smoking.

Options

A. Respiratory acidosis
B. Respiratory alkalosis
C. Emphysema
D. Asthma

Explanation

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the name of a chronic respiratory disorder that is primarily caused by cigarette smoking.

2. **Understand the Options**: The options provided are:
- A) Respiratory Acidosis
- B) Respiratory Alkalosis
- C) Emphysema
- D) Asthma

3. **Analyze Each Option**:
- **Option A: Respiratory Acidosis** - This condition is related to an increase in carbon dioxide in the blood and is not specifically caused by cigarette smoking.
- **Option B: Respiratory Alkalosis** - This condition is characterized by a decrease in carbon dioxide in the blood and is also not directly linked to cigarette smoking.
- **Option C: Emphysema** - This is a chronic obstructive pulmonary disease (COPD) that is primarily caused by cigarette smoking, leading to damage in the lungs.
- **Option D: Asthma** - While asthma can be exacerbated by smoking, it is not primarily caused by it.

4. **Select the Correct Answer**: Based on the analysis, the correct answer is **Option C: Emphysema**. It is a chronic respiratory disorder caused mainly by cigarette smoking.

5. **Conclusion**: Emphysema is characterized by the inflammation and abnormal distention of the bronchioles and alveoli, leading to irreversible damage and loss of elasticity in the lungs.

**Final Answer**: Emphysema

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